This is where the virus is taken up by the vector when it is feding on an infected source. The vrius is passed through the digestive system and into the hymolymph, and then back to the salivary glands. Once it is there, it begins to replicate. Now everytime the vector goes to feed on an uninfected plant, the saliva it elases to feed infects the plant. Since this occurs for the rest of the vector's life, it is persistant.

What is Non-Persistant Transmission?

This is where the virus is taken up into the stylet of the vector when it is testing its food source. the virus becomes trapped in the food canal of the vector. When the vecotr lands on another uninfected food source, it will insert its stylet into it testing it once again. Now the infected saliva is released infecting the new plant. However, this must all be done quick, because the virus cannot live within the stylet for long. Thus, this is non-persistant.